Re: [net-next:master 1077/1082] net/core/filter.c:1824:2: error: implicit declaration of function 'ip_tunnel_info_opts_get'

[Daniel Borkmann]

On 03/08/2016 09:20 PM, kbuild test robot wrote:

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git 
master
head:   f8b33d8e870758ccff13e5f81fd5050b52a42d35
commit: 14ca0751c96f8d3d0f52e8ed3b3236f8b34d3460 [1077/1082] bpf: support for 
access to tunnel options
config: x86_64-randconfig-i0-03080544 (attached as .config)
reproduce:
         git checkout 14ca0751c96f8d3d0f52e8ed3b3236f8b34d3460
         # save the attached .config to linux build tree
         make ARCH=x86_64

All errors (new ones prefixed by >>):

    net/core/filter.c: In function 'bpf_skb_get_tunnel_opt':

net/core/filter.c:1824:2: error: implicit declaration of function 
'ip_tunnel_info_opts_get' [-Werror=implicit-function-declaration]

      ip_tunnel_info_opts_get(to, info);
      ^
    net/core/filter.c: In function 'bpf_skb_set_tunnel_opt':

net/core/filter.c:1918:2: error: implicit declaration of function 
'ip_tunnel_info_opts_set' [-Werror=implicit-function-declaration]

      ip_tunnel_info_opts_set(info, from, size);
      ^
    cc1: some warnings being treated as errors

Hmm, I see, it depends on CONFIG_INET, the rest of tunnel key API apparently 
not. :/

The attached .config here has:

# CONFIG_INET is not set

I'll send you a follow-up fix.

Thanks,
Daniel